CN113751795A - Special reaming cutter for valve seat of cylinder cover of multi-cylinder diesel engine - Google Patents
Special reaming cutter for valve seat of cylinder cover of multi-cylinder diesel engine Download PDFInfo
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- CN113751795A CN113751795A CN202010498722.XA CN202010498722A CN113751795A CN 113751795 A CN113751795 A CN 113751795A CN 202010498722 A CN202010498722 A CN 202010498722A CN 113751795 A CN113751795 A CN 113751795A
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- cutting edge
- reamer
- cutter
- diesel engine
- cylinder
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- 238000005520 cutting process Methods 0.000 claims abstract description 61
- 229910052751 metal Inorganic materials 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims abstract description 6
- 239000000919 ceramic Substances 0.000 claims abstract description 5
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 19
- 230000003746 surface roughness Effects 0.000 abstract description 10
- 238000012545 processing Methods 0.000 abstract description 8
- 238000003754 machining Methods 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 238000012797 qualification Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002283 diesel fuel Substances 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910001182 Mo alloy Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 229910001563 bainite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910001567 cementite Inorganic materials 0.000 description 1
- 239000011195 cermet Substances 0.000 description 1
- OGSYQYXYGXIQFH-UHFFFAOYSA-N chromium molybdenum nickel Chemical compound [Cr].[Ni].[Mo] OGSYQYXYGXIQFH-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 238000007514 turning Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D77/00—Reaming tools
- B23D77/14—Reamers for special use, e.g. for working cylinder ridges
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling, Broaching, Filing, Reaming, And Others (AREA)
Abstract
The invention discloses a special reaming cutter for a valve seat of a cylinder cover of a multi-cylinder diesel engine, wherein the cutter adopts machine-clamped single-blade cutting, and boring machining is replaced by the single-blade cutting, so that higher shape precision and position precision can be achieved, and the surface roughness value is greatly reduced; the blade is a metal ceramic blade, has high hardness, wear resistance, red hardness, good anti-bonding property, good chemical stability and low friction coefficient, and can meet the surface quality requirement of the sealing ring belt; the reamer for the inner hole of the guide pipe adopts a push-reaming type, so that the requirements on the straightness and the surface roughness of the inner hole of the guide pipe are met, and the requirement on the coaxiality of the sealing ring belt relative to the inner hole of the guide pipe is met. The cutter solves the problems of poor surface roughness, large shape error and large coaxiality error of the inner hole of the relative guide pipe of the sealing ring belt, improves the processing qualification rate of the cylinder cover of the multi-cylinder diesel engine, saves manpower and processing cost, and has advanced technology and strong practicability.
Description
Technical Field
The invention relates to a turning reaming cutter, in particular to a reaming cutter special for a valve seat of a cylinder cover of a multi-cylinder diesel engine.
Background
The multi-cylinder diesel engine valve seat ring is generally made of nickel-chromium-molybdenum alloy cast iron, the basic structure of the multi-cylinder diesel engine valve seat ring is refined pearlite, a small amount of alloy cementite, a phosphorus eutectic compound and about 10% of needle-shaped structures (bainite and retained austenite) are contained, and the hardness is 35-40HRC, so that the multi-cylinder diesel engine valve seat ring has the characteristics of high hardness, high strength, good oxidation resistance and wear resistance and the like. The chamfer of the valve seat ring in the cylinder cover is commonly called a valve line and is matched with the valve to form a sealing ring belt so as to ensure that the phenomenon of air leakage does not occur when the diesel engine works. The inventor has published a paper of 'reaming cutter special for valve seat of cylinder head of multi-cylinder diesel engine' in journal of 'cold working of metal processing' in 6 months in 2019. The past processing mode is that firstly a reamer reams a valve seat, and then a pneumatic grinder grinds a valve seat ring to form a sealing ring belt to meet the sealing requirement, so that a coupling part is matched between a valve and the valve seat ring, interchangeability is avoided, and grinding production efficiency is low. At the beginning, a six-blade conical reamer (blade material YG6) is adopted for reaming, the surface roughness of the sealing ring band is difficult to meet the requirement, the coaxiality of a valve guide pipe hole and the sealing ring band of the seat ring is not in accordance with the requirement, the quality is unstable, and the leakage condition is serious. Therefore, in order to solve these problems, scientific and technical personnel of scientific research institutions and enterprises are continuously exploring and researching, and although some progress is made in the technology, the technical problem which is not overcome in the practical application still exists.
Disclosure of Invention
The invention aims to overcome the defects and provides a reaming cutter special for a valve seat of a cylinder cover of a multi-cylinder diesel engine, which comprises: the reamer is pushed to cutter body, blade, pipe hole. The cutter adopts machine-clamped single-edge cutting, and boring machining is replaced by single-edge cutting, so that higher shape precision and position precision can be achieved, and the surface roughness value is greatly reduced; the blade is a metal ceramic blade, has high hardness, wear resistance, red hardness, good anti-bonding property, good chemical stability and low friction coefficient, and can meet the surface quality requirement of the sealing ring belt; the reamer for the inner hole of the guide pipe adopts a push-reaming type, so that the requirements on the straightness and the surface roughness of the inner hole of the guide pipe are met, and the requirement on the coaxiality of the sealing ring belt relative to the inner hole of the guide pipe is met. The cutter solves the problems of poor surface roughness, large shape error and large coaxiality error of the inner hole of the relative guide pipe of the sealing ring belt, improves the processing qualification rate of the cylinder cover of the multi-cylinder diesel engine, saves manpower and processing cost, and has advanced technology and strong practicability.
The technical scheme adopted by the invention is as follows: a multi-cylinder diesel engine cylinder head valve seat special reaming cutter, this cutter includes: cutter body, blade, valve seat valve, pipe hole push reamer, locking bolt, chip breaker groove, end face cutting edge relief angle, radial cutting edge rake angle, radial cutting edge blade area width, seat circle valve line reamer relief angle, the cutter body be the cylinder type shape, adopt 38CrMoAl alloy modulation steel to make, the cutter body is equipped with the chip breaker groove, the blade adopts machine clamp formula cermet blade, sets up on the cutter body, becomes 45 degrees with cutter body center pin, the pipe hole pushes away the reamer and adopts carbide to make, becomes to push away the reamer cutting form, the cutting edge adopts the levogyration, helical pitch 20mm, 6 sword equipartitions set up on the cutter body, with the cutter body same shaft degree, with locking bolt fixed.
Further, the pipe hole push reamer on be equipped with end face cutting edge relief angle, radial cutting edge rake angle, radial cutting edge land width, end face cutting edge relief angle is 10, radial cutting edge relief angle is 5, radial cutting edge rake angle is 10, radial cutting edge land width is 0.15 mm.
Furthermore, the chip breaker groove is provided with a seat ring valve line reamer relief angle which is 15 degrees.
The technical principle of the invention is as follows: a multi-cylinder diesel engine cylinder head valve seat specialized reaming cutter, at first, the previous process guarantees the valve seat ring hole of the cylinder head and position and shape accuracy control of the conduit hole are in the range of requirement of the pattern; then, a vertical numerical control boring and milling machine with higher precision is selected during machining, the rotation precision of a main shaft is less than or equal to 0.01mm, the workpiece positioning reference is selected to coincide with the design reference, a high-precision elastic chuck is adopted to clamp a cutter, the rotating speed of the main shaft is 1000r/min during cutting, the feeding amount of an inner hole of a reaming guide pipe is 0.3mm/r, the feeding amount of a reaming sealing ring belt is 0.05mm/r, the reaming allowance of the inner hole of the guide pipe is 0.25mm, and diesel oil is adopted for cooling and lubricating during reaming. By adopting the cutter for processing, the valve seat ring and the valve are matched to completely meet the sealing requirement, the bounce degree of the inner hole of the guide pipe and the seat ring sealing ring is low, and the reaming amount is reliable and stable.
Key angle:
1. the back angle of the cutting edge on the end face of the conduit reamer is 10 degrees, the friction between the end face of the cutter and the conduit during cutting is reduced, and the sharpness of the cutting edge is ensured.
2. The radial cutting edge back angle of the guide pipe reamer is 5 degrees, and the machining allowance is small (the unilateral cutting is 0.15 mm), so that the stability of the cutter in machining is ensured, and the friction between the cutter and the guide pipe is reduced.
3. The front angle of the radial cutting edge of the conduit reamer is 10 degrees, and the good cutting performance and the chip removal function of the cutter in the radial direction are ensured.
4. The width of a cutting edge strip of a radial cutting edge of the conduit reamer is 0.15mm, the requirement of straightness of a cutter during processing is ensured, and a certain extrusion is formed on the surface of the conduit to reduce the surface roughness value.
5. The clearance angle of the seat ring valve line reamer is 15 degrees, the sharpness of a cutting edge of the cutter is ensured, and the vibration caused by the friction surface between the rear cutter surface and the workpiece is reduced.
The invention has the beneficial effects that:
1. the blade is a metal ceramic blade, has high hardness, wear resistance, red hardness, good anti-bonding property, good chemical stability and low friction coefficient, and can meet the surface quality requirement of the sealing ring belt;
2. the cutter is designed into a mechanical clamping type single-edge cutting mode, the single-edge cutting mode is equivalent to boring machining, high shape precision and position precision can be achieved, and the surface roughness value is greatly reduced;
3. the reamer for the inner hole of the guide pipe is designed into a push-hinge type, so that the requirements on the straightness and the surface roughness of the inner hole of the guide pipe are met, and the requirement on the coaxiality of the sealing ring belt relative to the inner hole of the guide pipe is met.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is an angular position diagram of the present invention;
fig. 3 is a schematic cross-sectional rotation diagram of a conduit inner hole push reamer.
In fig. 1, 2, 3: 1. the valve seat reamer comprises a cutter body, 2 parts of blades, 3 parts of a valve seat valve, 4 parts of a guide pipe inner hole pushing reamer, 5 parts of a locking bolt, 6 parts of a chip breaker groove, 7 parts of an end face cutting edge relief angle, 8 parts of a radial cutting edge relief angle, 9 parts of a radial cutting edge rake angle, 10 parts of a radial cutting edge strip width and 11 parts of a seat ring valve line reamer relief angle.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Referring to fig. 1, 2 and 3, the present invention provides the following technical solutions: a multi-cylinder diesel engine cylinder head valve seat special reaming cutter, this cutter includes: the cutter body 1, the blade 2, the valve seat valve 3, the pipe inner hole push reamer 4, the locking bolt 5, the chip breaker groove 6, the end face cutting edge relief angle 7, the radial cutting edge relief angle 8, the radial cutting edge rake angle 9, the radial cutting edge blade strip width 10, the seat ring valve reamer relief angle 11, the cutter body 1 is in a cylindrical shape and is made of 38CrMoAl alloy modulation steel, the cutter body 1 is provided with the chip breaker groove 6, the blade 2 adopts a mechanically-clamped metal ceramic blade and is arranged on the cutter body 1 to form a 45-degree angle with the central shaft of the cutter body 1, the pipe inner hole push reamer 4 is made of hard alloy and is in a push reamer cutting form, the blade adopts a left-hand rotation, the lead is 20mm, 6 blades are uniformly distributed and are arranged on the cutter body 1 and are in the same shaft degree with the cutter body 1 and are fixed through the locking bolt 5.
Furthermore, the guide pipe inner hole push reamer 4 is provided with an end face cutting edge back angle 7, a radial cutting edge back angle 8, a radial cutting edge front angle 9 and a radial cutting edge blade width 10, the end face cutting edge back angle is 10 degrees, the radial cutting edge back angle is 5 degrees, the radial cutting edge front angle is 10 degrees, and the radial cutting edge blade width is 0.15 mm.
Further, a seat ring valve line reamer relief angle 11 is arranged on the chip breaker groove 6, and the seat ring valve line reamer relief angle is 15 degrees.
A multi-cylinder diesel engine cylinder head valve seat specialized reaming cutter, at first, the previous process guarantees the valve seat ring hole of the cylinder head and position and shape accuracy control of the conduit hole are in the range of requirement of the pattern; then, a vertical numerical control boring and milling machine with higher precision is selected during machining, the rotation precision of a main shaft is less than or equal to 0.01mm, the workpiece positioning reference is selected to coincide with the design reference, a high-precision elastic chuck is adopted to clamp a cutter, the rotating speed of the main shaft is 1000r/min during cutting, the feeding amount of an inner hole of a reaming guide pipe is 0.3mm/r, the feeding amount of a reaming sealing ring belt is 0.05mm/r, the reaming allowance of the inner hole of the guide pipe is 0.25mm, and diesel oil is adopted for cooling and lubricating during reaming.
The cutter of the invention is adopted to process the valve seat of the cylinder cover of the multi-cylinder diesel engine, the valve seat ring and the valve are matched to completely meet the sealing requirement, the jumping degree of the sealing ring belt of the inner hole of the guide pipe and the seat ring is less than or equal to 0.03mm, and the reaming quality is reliable and stable.
Claims (3)
1. A multi-cylinder diesel engine cylinder head valve seat special reaming cutter includes: cutter body, blade, valve carrier valve, pipe hole push away reamer, locking bolt, chip breaker groove, end face cutting edge relief angle, radial cutting edge rake angle, radial cutting edge blade width of the edge of the cutting, seat circle valve line reamer relief angle, characterized by: the cutter body is cylindrical, is made of 38CrMoAl alloy modulation steel, is provided with a chip breaker groove, is a mechanically clamped metal ceramic blade and is arranged on the cutter body and forms a 45-degree angle with the central shaft of the cutter body, the guide pipe inner hole push reamer is made of hard alloy and is in a push reamer cutting mode, the cutting edge is in a left-handed mode, the lead is 20mm, 6 blades are uniformly distributed, and the cutting edge is arranged on the cutter body and is coaxial with the cutter body and fixed by a locking bolt.
2. The reaming tool special for the valve seat of the cylinder cover of the multi-cylinder diesel engine as claimed in claim 1, which is characterized in that: the pipe hole push reamer on be equipped with end face cutting edge relief angle, radial cutting edge rake angle, radial cutting edge sword area width, end face cutting edge relief angle is 10, radial cutting edge relief angle is 5, radial cutting edge rake angle is 10, radial cutting edge sword area width is 0.15 mm.
3. The reaming tool special for the valve seat of the cylinder cover of the multi-cylinder diesel engine as claimed in claim 1, which is characterized in that: the chip breaker groove is provided with a seat ring valve line reamer relief angle which is 15 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010498722.XA CN113751795A (en) | 2020-06-04 | 2020-06-04 | Special reaming cutter for valve seat of cylinder cover of multi-cylinder diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010498722.XA CN113751795A (en) | 2020-06-04 | 2020-06-04 | Special reaming cutter for valve seat of cylinder cover of multi-cylinder diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113751795A true CN113751795A (en) | 2021-12-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010498722.XA Pending CN113751795A (en) | 2020-06-04 | 2020-06-04 | Special reaming cutter for valve seat of cylinder cover of multi-cylinder diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113751795A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020102141A1 (en) * | 2001-01-29 | 2002-08-01 | Meece Roy Dean | Method for reaming hole and improved reamer |
| CN102950335A (en) * | 2012-11-21 | 2013-03-06 | 大连经济技术开发区伊达工具有限公司 | Metal ceramic reamer |
| CN206010028U (en) * | 2016-08-24 | 2017-03-15 | 南通万达锅炉有限公司 | The special reamer of skiving in pipe port |
| CN207952802U (en) * | 2018-01-11 | 2018-10-12 | 常熟阿诺切削工具有限公司 | A kind of asymmetric flute profile entirety taper reamer |
-
2020
- 2020-06-04 CN CN202010498722.XA patent/CN113751795A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020102141A1 (en) * | 2001-01-29 | 2002-08-01 | Meece Roy Dean | Method for reaming hole and improved reamer |
| CN102950335A (en) * | 2012-11-21 | 2013-03-06 | 大连经济技术开发区伊达工具有限公司 | Metal ceramic reamer |
| CN206010028U (en) * | 2016-08-24 | 2017-03-15 | 南通万达锅炉有限公司 | The special reamer of skiving in pipe port |
| CN207952802U (en) * | 2018-01-11 | 2018-10-12 | 常熟阿诺切削工具有限公司 | A kind of asymmetric flute profile entirety taper reamer |
Non-Patent Citations (1)
| Title |
|---|
| 丁秋林: "多缸柴油机气缸盖气门座铰削刀具设计", 金属加工(冷加工), no. 10, 1 October 2019 (2019-10-01), pages 56 - 57 * |
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